You are trapped in a room full of bad guys. You need to shoot your way out. The moment they stick their heads out it is your turn to shoot them down. Aim directly in the head and spill their brains all over the place. A straight shot in the head is the only way to kill them for good. You have to be fast and precise in order to stay alive. Gut spiller is a great free game where you get some awesome free shooting action.